Question

Stress on materials that leads to dimensional shortening is termed:

• A. Flexural stress
• B. Shear stress
• C. Tensile stress
• D. Compressive stress

Hint:

Compressive stress is essential in understanding material behavior under load, particularly in structures designed to carry weight.

Answer 1

The Correct Option is D

Stress types are distinguished by force direction and effect: tension stretches, shear slides layers sideways, flexure bends and stretches/shortens opposite faces at once, while compression pushes a material together along its length, directly producing the dimensional shortening described in the question.

Since "shortening" specifically describes a shrink along the direction of load, it points straight to compression rather than the other three effects.

Therefore, the correct answer is Compressive stress.

Answer 2

Picturing a simple physical example for each stress also confirms the choice.

1. Flexural stress: Like bending a wooden scale, one side stretches while the other side shortens, not the whole piece uniformly shortening.
2. Shear stress: Like using scissors to cut paper, the layers slide past each other rather than the paper getting shorter.
3. Tensile stress: Like stretching a rubber band, the material becomes longer, the opposite of shortening.
4. Compressive stress: Like squeezing a sponge between your palms, the material becomes shorter along the direction you push, matching the exact behavior asked about.

The squeezing example matches "dimensional shortening" precisely, confirming compression as the answer.

Therefore, the correct answer is Compressive stress.